Summary of Multi salt experiments.

Overview

All experiments were performed with:

Flux 20 LMH (permeate flow 17 mL/min)

Crossflow of 0.5 m/s (feed flow 1160 mL/min)

The concentration of the various salts were selected based on concentration of authentic CT reservior water, see table below. It was attempted to mimic the concentration of authentic CT reservoir water, the focus was on species: Na, Cl, SO4, Ca, Sio2 and HCO3. The concentration of the various species was chosen based on possible salt combination and concentration. A bicarbonate-carbonate buffer was used to achieve some buffer effect with range between pH 9.2-10.6. Three different experiment were made with varying pH value of 9.2, 10 and 10.5. This gave varying concentration og HCO3 and Na due to content in buffer species.

Ion Species Authentic CT water pH 9.2 pH 10 pH 10.5
Na [mM] 10.81 11.77 14.76 16.63
Cl [mM] 2.48 2.50 2.50 2.50
SO4 [mM] 0.64 0.70 0.70 0.70
Ca [mM] 0.35 0.40 0.40 0.40
SiO2 [mM] 0.68 0.70 0.70 0.70
HCO3[mM] 7.29 6.07 3.08 1.21

The experiment will investigate the impact of change in pH on ion rejection.

The pH was monitored in the feed stream with data logging every 1 sec. The pH increase slightly for all filtration but at a similar rate, giving stable pH for comparison between filtration with different initial pH value.

The three different filtration have been performed with the same parameters, except that filtration with pH 10 had initial feed volume of 8.5 L which also lead to lower total filtration time at 6.6 hours compared to 8.6 hours for the filtration with pH 9.2 and 8.1 hours for filration with pH 10.5. The shorter filtration time leads to lower water recovery. When performing the experiment the feed container was run until nothing was left, and still only a recovery of 88 % was maximum obtained from filtration with pH 9.2. When ending the experiment water exits the system presumably the water which were pushed in the pressure dampeners during filtration it is estimated that this volume is 250 mL. This still leaves about 0.950 L, 1.6 L and 1.5 L from the filtration with pH 9.2, pH 10 and pH 10.5 to be lost.

WHERE DOES THE WATER GO???

pH of experiment 9.2 10 10.5
Total filtration time [h] 8.6836111 6.6111111 8.1486111
Average permeate flow [mL/min] 16.9952847 16.97844 16.9692466
Total permeate volume [L] 8.8058235 6.639136 8.1200673
Water Recovery % 88.058235 78.1074824 81.2006733
Water lost for ever 0.9441765 1.610864 1.6299327

The average permeate flow is the same for all experiments at 17 mL/min, which is what the system is regulated according to. There are larger fluctuations in permeate flow for the experiment with pH 9.2 but after this experiment the regulation value was altered slightly, which is why there is less fluctuations in the remaining filtrations with pH 10 and 10.5. The data has been collected every second and a rooling average have been calculated over 1 min.

Pressure

NORMALISER I FORHOLD OSMOTISK TRYK.

The data has been collected every second. For filtration with pH 9.2 the pressure started at 2.5 bar where it increased to about 2.8 bar over the course of the experiment. The filtration with pH of 10 had further increase in pressure for a shorter time frame, increasing to about 3 bar. The filtration with pH of 10.5 the pressure increased further to about max of 3.5 bar. This increase in pressure could indicate higher ion content on the feed side and thus increase in pressure due to osmotic pressure or fouling. This higher pH give higher rejection.

Conductivity Rejection

The rejection for filtration with pH 9.2 fluctuate with decrease from 56 % to 52% and increase back to 54 %. The rejection of filtration with pH 10 slightly increase from 65 % - 70% rejection. The rejection of filtration with pH 10.h slightly increase from 75 % - 78% rejection.

When comparing the rejection of conductivity between the filtration it correlates with data for pressure with higher rejection and higher increase in pressure of filtration with higher pH.

Bicarbonate

Bicarboante was analysed as total alkalinity. Samples were only taken from feed stream and were taken at the start and end of teh filtration along with one sample takne in the middle of the experiments. Generally the bicarboatne content increase despite pH. The Bicarbonate content also increases almost linearly as the concentration of silica increases which could indicate that the silica concentration affects the alkalinity analysis instead of a greater concentration of bicarbonate.

Here are the bicarbonate results as given by alkalinity, note the limit of ~1200 of the analysis

Plotting all silica and bicarbonate concentrations are 1. very difficult to look at and 2. shows a trend of increasing bicarb content when silica increases

Plotting the bicarbonate concentration as a function of silica shows linear relation for each of the experiments 8last 3 plots). For the overall relations (plottet right below) the specific trend is more difficult to grasp

Chloride DIT-M

From the results achieved with DIT-M photometer nothing can be concluded regarding trends due to very high error bars. The errorbars are so high it cannot be distinguesed between different samples. The high errorbars is the results of very high dilution factor at 25 as well as uncertainty of the instrument of 3 mg/L. Furthermore all measured samples are much higher than the theroretical calcuclated initial feed value at 88 mg/L (included as horizontal dashed line).

Ion Rejections

Rejection of Silica

The rejection of silica correlates with rejection of over all conductivity where higher pH lead to higher rejection of silica. Filtration with pH 9.2 have rejection of 21 % increasing to 27 %, with a presumed outlier at 6 h. Filtration with pH 10 have significantly higher rejection of 49 % increasing to 58 %. The rejectino of filtration with pH 10.5 so only slighly higher with rejection of 65 % increasing to 72 %. Overall the silica rejetion is lower than the genereal conductivity rejection. inducating that the pH influence other ions differently.

IC results

The ion results were obtained by IC analysis of samples taken at various times from feed and permeate streams for each experiment.

pH 9.2
pH 10
pH 10.5

Comparison of results

###Ny IC data nu med errorbars.

##               Name Time   Stream Recovery  ion       Value          Std
## 1    ID:1 - pH 9.3 0.00     Feed    0.000   Cl  3.87113447 1.341409e-02
## 2    ID:1 - pH 9.3 3.50     Feed   35.700   Cl  3.67885308 5.064231e-03
## 3    ID:1 - pH 9.3 3.50 Permeate   35.700   Cl  3.72986651 6.695382e-03
## 4    ID:1 - pH 9.3 5.00     Feed   51.000   Cl  3.71557154 3.872658e-02
## 5    ID:1 - pH 9.3 5.00 Permeate   51.000   Cl  3.82194295 3.707831e-02
## 6    ID:1 - pH 9.3 6.00     Feed   61.200   Cl  3.69034512 5.198841e-02
## 7    ID:1 - pH 9.3 6.00 Permeate   61.200   Cl  3.77947847 7.341660e-04
## 8    ID:1 - pH 9.3 7.00     Feed   71.400   Cl  3.60149206 2.905692e-02
## 9    ID:1 - pH 9.3 7.00 Permeate   71.400   Cl  3.86931256 7.207065e-02
## 10   ID:1 - pH 9.3 8.00     Feed   81.600   Cl  3.37473456 5.755520e-03
## 11   ID:1 - pH 9.3 8.00 Permeate   81.600   Cl  3.83609778 1.115995e-02
## 12   ID:1 - pH 9.3 8.70     Feed   88.740   Cl  3.27649167 1.096698e-01
## 13   ID:1 - pH 9.3 8.70 Permeate   88.740   Cl  3.87351697 2.200195e-03
## 14  ID:2 - pH 10.2 0.00     Feed    0.000   Cl  3.72326332 6.429596e-03
## 15  ID:2 - pH 10.2 3.00     Feed   36.000   Cl  3.48935625 8.788372e-03
## 16  ID:2 - pH 10.2 3.00 Permeate   36.000   Cl  3.37617992 4.687988e-04
## 17  ID:2 - pH 10.2 4.00     Feed   48.000   Cl  3.49131480 3.966716e-04
## 18  ID:2 - pH 10.2 4.00 Permeate   48.000   Cl  3.56923719 1.884628e-03
## 19  ID:2 - pH 10.2 5.00     Feed   60.000   Cl  3.44011266 2.933051e-03
## 20  ID:2 - pH 10.2 5.00 Permeate   60.000   Cl  3.75711829 3.633426e-03
## 21  ID:2 - pH 10.2 5.50     Feed   66.000   Cl  3.37492085 8.148418e-03
## 22  ID:2 - pH 10.2 5.50 Permeate   66.000   Cl  3.98221187 7.442340e-02
## 23  ID:2 - pH 10.2 6.00     Feed   72.000   Cl  3.23124707 2.326674e-03
## 24  ID:2 - pH 10.2 6.00 Permeate   72.000   Cl  3.91534131 6.063644e-04
## 25  ID:2 - pH 10.2 6.50     Feed   78.000   Cl  3.09890492 4.979760e-03
## 26  ID:2 - pH 10.2 6.50 Permeate   78.000   Cl  4.00291656 6.919482e-04
## 27  ID:3 - pH 10.5 0.00     Feed    0.000   Cl  3.44766707 1.279681e-02
## 28  ID:3 - pH 10.5 2.50     Feed   25.500   Cl  3.49313346 4.077926e-03
## 29  ID:3 - pH 10.5 2.50 Permeate   25.500   Cl  3.33407105 3.857097e-03
## 30  ID:3 - pH 10.5 4.00     Feed   40.800   Cl  3.49215418 1.529651e-03
## 31  ID:3 - pH 10.5 4.00 Permeate   40.800   Cl  3.63694713 6.201403e-03
## 32  ID:3 - pH 10.5 5.00     Feed   51.000   Cl  3.44584842 1.377962e-03
## 33  ID:3 - pH 10.5 5.00 Permeate   51.000   Cl  3.83000440 1.446375e-03
## 34  ID:3 - pH 10.5 6.00     Feed   61.200   Cl  3.26510204 2.423736e-04
## 35  ID:3 - pH 10.5 6.00 Permeate   61.200   Cl  4.04824305 4.593919e-03
## 36  ID:3 - pH 10.5 7.00     Feed   71.400   Cl  3.09163030 7.679196e-04
## 37  ID:3 - pH 10.5 7.00 Permeate   71.400   Cl  4.12686493 0.000000e+00
## 38  ID:3 - pH 10.5 8.00     Feed   81.600   Cl  2.68984734 7.649407e-03
## 39  ID:3 - pH 10.5 8.00 Permeate   81.600   Cl  4.18702045 7.087748e-03
## 40   ID:1 - pH 9.3 0.00     Feed    0.000  SO4  0.69959201 2.332851e-02
## 41   ID:1 - pH 9.3 3.50     Feed   35.700  SO4  0.96752081 2.013513e-03
## 42   ID:1 - pH 9.3 3.50 Permeate   35.700  SO4  0.00000000          NaN
## 43   ID:1 - pH 9.3 5.00     Feed   51.000  SO4  1.30895888 2.968995e-02
## 44   ID:1 - pH 9.3 5.00 Permeate   51.000  SO4  0.00000000          NaN
## 45   ID:1 - pH 9.3 6.00     Feed   61.200  SO4  1.56387146 4.919247e-02
## 46   ID:1 - pH 9.3 6.00 Permeate   61.200  SO4  0.00000000          NaN
## 47   ID:1 - pH 9.3 7.00     Feed   71.400  SO4  1.89342346 3.007915e-02
## 48   ID:1 - pH 9.3 7.00 Permeate   71.400  SO4  0.00000000          NaN
## 49   ID:1 - pH 9.3 8.00     Feed   81.600  SO4  2.23211211 4.452898e-04
## 50   ID:1 - pH 9.3 8.00 Permeate   81.600  SO4  0.00000000          NaN
## 51   ID:1 - pH 9.3 8.70     Feed   88.740  SO4  3.23405138 9.133991e-02
## 52   ID:1 - pH 9.3 8.70 Permeate   88.740  SO4  0.00000000          NaN
## 53  ID:2 - pH 10.2 0.00     Feed    0.000  SO4  0.73636410 2.971945e-03
## 54  ID:2 - pH 10.2 3.00     Feed   36.000  SO4  1.20047437 9.032008e-03
## 55  ID:2 - pH 10.2 3.00 Permeate   36.000  SO4  0.00000000          NaN
## 56  ID:2 - pH 10.2 4.00     Feed   48.000  SO4  1.42492586 3.909367e-03
## 57  ID:2 - pH 10.2 4.00 Permeate   48.000  SO4  0.00000000          NaN
## 58  ID:2 - pH 10.2 5.00     Feed   60.000  SO4  1.76585861 2.422274e-03
## 59  ID:2 - pH 10.2 5.00 Permeate   60.000  SO4  0.00000000          NaN
## 60  ID:2 - pH 10.2 5.50     Feed   66.000  SO4  2.12550152 6.364850e-03
## 61  ID:2 - pH 10.2 5.50 Permeate   66.000  SO4  0.00000000          NaN
## 62  ID:2 - pH 10.2 6.00     Feed   72.000  SO4  2.34692844 1.144391e-02
## 63  ID:2 - pH 10.2 6.00 Permeate   72.000  SO4  0.00000000          NaN
## 64  ID:2 - pH 10.2 6.50     Feed   78.000  SO4  2.85161020 4.081374e-03
## 65  ID:2 - pH 10.2 6.50 Permeate   78.000  SO4  0.00000000          NaN
## 66  ID:3 - pH 10.5 0.00     Feed    0.000  SO4  0.71873716 8.580889e-04
## 67  ID:3 - pH 10.5 2.50     Feed   25.500  SO4  1.00088064 1.292028e-03
## 68  ID:3 - pH 10.5 2.50 Permeate   25.500  SO4  0.00000000          NaN
## 69  ID:3 - pH 10.5 4.00     Feed   40.800  SO4  1.27777684 4.670968e-04
## 70  ID:3 - pH 10.5 4.00 Permeate   40.800  SO4  0.00000000          NaN
## 71  ID:3 - pH 10.5 5.00     Feed   51.000  SO4  1.47979022 5.512193e-03
## 72  ID:3 - pH 10.5 5.00 Permeate   51.000  SO4  0.00000000          NaN
## 73  ID:3 - pH 10.5 6.00     Feed   61.200  SO4  1.75319761 2.326289e-03
## 74  ID:3 - pH 10.5 6.00 Permeate   61.200  SO4  0.00000000          NaN
## 75  ID:3 - pH 10.5 7.00     Feed   71.400  SO4  2.22770397 5.804924e-04
## 76  ID:3 - pH 10.5 7.00 Permeate   71.400  SO4  0.00000000          NaN
## 77  ID:3 - pH 10.5 8.00     Feed   81.600  SO4  3.02844225 8.310209e-03
## 78  ID:3 - pH 10.5 8.00 Permeate   81.600  SO4  0.00000000          NaN
## 79   ID:1 - pH 9.3 0.00     Feed    0.000   Ca  0.19717648 7.967596e-03
## 80   ID:1 - pH 9.3 3.50     Feed   35.700   Ca  0.60433838 4.181924e-03
## 81   ID:1 - pH 9.3 3.50 Permeate   35.700   Ca  0.13071684 5.225442e-04
## 82   ID:1 - pH 9.3 5.00     Feed   51.000   Ca  0.71890398 2.574856e-02
## 83   ID:1 - pH 9.3 5.00 Permeate   51.000   Ca  0.14713855 1.996165e-02
## 84   ID:1 - pH 9.3 6.00     Feed   61.200   Ca  0.84593077 9.608746e-03
## 85   ID:1 - pH 9.3 6.00 Permeate   61.200   Ca  0.14660726 2.702260e-02
## 86   ID:1 - pH 9.3 7.00     Feed   71.400   Ca  1.00613907 4.887976e-03
## 87   ID:1 - pH 9.3 7.00 Permeate   71.400   Ca  0.16312558 1.004948e-02
## 88   ID:1 - pH 9.3 8.00     Feed   81.600   Ca  1.15605966 1.205326e-02
## 89   ID:1 - pH 9.3 8.00 Permeate   81.600   Ca  0.18027178 1.629278e-02
## 90   ID:1 - pH 9.3 8.70     Feed   88.740   Ca  0.75102292 8.185475e-03
## 91   ID:1 - pH 9.3 8.70 Permeate   88.740   Ca  0.18123776 9.422060e-03
## 92  ID:2 - pH 10.2 0.00     Feed    0.000   Ca  0.08213031 4.978457e-03
## 93  ID:2 - pH 10.2 3.00     Feed   36.000   Ca  0.25955567 3.675737e-03
## 94  ID:2 - pH 10.2 3.00 Permeate   36.000   Ca  0.04811013 6.515808e-02
## 95  ID:2 - pH 10.2 4.00     Feed   48.000   Ca  0.29367222 9.282053e-04
## 96  ID:2 - pH 10.2 4.00 Permeate   48.000   Ca  0.04517070 8.297605e-02
## 97  ID:2 - pH 10.2 5.00     Feed   60.000   Ca  0.34783466 1.097140e-02
## 98  ID:2 - pH 10.2 5.00 Permeate   60.000   Ca  0.05018218 8.283755e-02
## 99  ID:2 - pH 10.2 5.50     Feed   66.000   Ca  0.39486539 7.938815e-03
## 100 ID:2 - pH 10.2 5.50 Permeate   66.000   Ca  0.06068699 7.523607e-02
## 101 ID:2 - pH 10.2 6.00     Feed   72.000   Ca  0.43057213 1.187032e-02
## 102 ID:2 - pH 10.2 6.00 Permeate   72.000   Ca  0.04839925 1.154575e-01
## 103 ID:2 - pH 10.2 6.50     Feed   78.000   Ca  0.47312145 4.033038e-03
## 104 ID:2 - pH 10.2 6.50 Permeate   78.000   Ca  0.06353004           NA
## 105 ID:3 - pH 10.5 0.00     Feed    0.000   Ca  0.09147863 4.320711e-02
## 106 ID:3 - pH 10.5 2.50     Feed   25.500   Ca  0.11812616 3.980613e-02
## 107 ID:3 - pH 10.5 2.50 Permeate   25.500   Ca  0.03220834 2.115819e-02
## 108 ID:3 - pH 10.5 4.00     Feed   40.800   Ca  0.12983566 2.834306e-02
## 109 ID:3 - pH 10.5 4.00 Permeate   40.800   Ca  0.03490683 1.171353e-02
## 110 ID:3 - pH 10.5 5.00     Feed   51.000   Ca  0.13581087 3.111029e-02
## 111 ID:3 - pH 10.5 5.00 Permeate   51.000   Ca  0.03760531 7.248660e-03
## 112 ID:3 - pH 10.5 6.00     Feed   61.200   Ca  0.14419545 1.701366e-02
## 113 ID:3 - pH 10.5 6.00 Permeate   61.200   Ca  0.03934005 2.771609e-02
## 114 ID:3 - pH 10.5 7.00     Feed   71.400   Ca  0.16274753 2.637989e-02
## 115 ID:3 - pH 10.5 7.00 Permeate   71.400   Ca  0.04266497 1.118082e-02
## 116 ID:3 - pH 10.5 8.00     Feed   81.600   Ca  0.19546666 1.255095e-02
## 117 ID:3 - pH 10.5 8.00 Permeate   81.600   Ca  0.04806194 2.977590e-02
## 118  ID:1 - pH 9.3 0.00     Feed    0.000   Na 13.07426933 1.239857e-03
## 119  ID:1 - pH 9.3 3.50     Feed   35.700   Na 14.94562455 9.431423e-04
## 120  ID:1 - pH 9.3 3.50 Permeate   35.700   Na  7.51602040 9.002115e-03
## 121  ID:1 - pH 9.3 5.00     Feed   51.000   Na 16.93858048 1.248261e-04
## 122  ID:1 - pH 9.3 5.00 Permeate   51.000   Na  8.93984512 8.206954e-02
## 123  ID:1 - pH 9.3 6.00     Feed   61.200   Na 18.48849119 2.782804e-03
## 124  ID:1 - pH 9.3 6.00 Permeate   61.200   Na  8.70461752 1.052580e-03
## 125  ID:1 - pH 9.3 7.00     Feed   71.400   Na 23.47960238 1.750004e-01
## 126  ID:1 - pH 9.3 7.00 Permeate   71.400   Na  9.65699031 4.524923e-03
## 127  ID:1 - pH 9.3 8.00     Feed   81.600   Na 22.61344649 6.233393e-04
## 128  ID:1 - pH 9.3 8.00 Permeate   81.600   Na 10.85356125 6.493652e-05
## 129  ID:1 - pH 9.3 8.70     Feed   88.740   Na 27.20536845 5.699403e-04
## 130  ID:1 - pH 9.3 8.70 Permeate   88.740   Na 11.12267758 1.083548e-02
## 131 ID:2 - pH 10.2 0.00     Feed    0.000   Na 15.07290142 4.142558e-03
## 132 ID:2 - pH 10.2 3.00     Feed   36.000   Na 18.47607894 1.522685e-02
## 133 ID:2 - pH 10.2 3.00 Permeate   36.000   Na  5.50332499 2.677131e-03
## 134 ID:2 - pH 10.2 4.00     Feed   48.000   Na 20.71245273 1.344728e-02
## 135 ID:2 - pH 10.2 4.00 Permeate   48.000   Na  6.07829332 1.269657e-02
## 136 ID:2 - pH 10.2 5.00     Feed   60.000   Na 24.81953427 4.683798e-03
## 137 ID:2 - pH 10.2 5.00 Permeate   60.000   Na  6.80506520 5.464105e-03
## 138 ID:2 - pH 10.2 5.50     Feed   66.000   Na 27.78173927 1.109116e-03
## 139 ID:2 - pH 10.2 5.50 Permeate   66.000   Na  7.32050273 7.475310e-03
## 140 ID:2 - pH 10.2 6.00     Feed   72.000   Na 30.10317308 7.909524e-03
## 141 ID:2 - pH 10.2 6.00 Permeate   72.000   Na  7.84238942 7.156770e-04
## 142 ID:2 - pH 10.2 6.50     Feed   78.000   Na 35.13822831 3.188775e-03
## 143 ID:2 - pH 10.2 6.50 Permeate   78.000   Na  8.71848439 7.725129e-03
## 144 ID:3 - pH 10.5 0.00     Feed    0.000   Na 16.77746672 2.299915e-03
## 145 ID:3 - pH 10.5 2.50     Feed   25.500   Na 21.11775828 7.906871e-03
## 146 ID:3 - pH 10.5 2.50 Permeate   25.500   Na  4.79044364 1.083756e-02
## 147 ID:3 - pH 10.5 4.00     Feed   40.800   Na 25.58212132 5.967654e-03
## 148 ID:3 - pH 10.5 4.00 Permeate   40.800   Na  5.46711042 1.847907e-02
## 149 ID:3 - pH 10.5 5.00     Feed   51.000   Na 28.76220833 1.363482e-03
## 150 ID:3 - pH 10.5 5.00 Permeate   51.000   Na  6.03066868 1.326218e-02
## 151 ID:3 - pH 10.5 6.00     Feed   61.200   Na 32.81679450 2.560759e-03
## 152 ID:3 - pH 10.5 6.00 Permeate   61.200   Na  6.68699577 1.353425e-02
## 153 ID:3 - pH 10.5 7.00     Feed   71.400   Na 39.00563403 3.231684e-04
## 154 ID:3 - pH 10.5 7.00 Permeate   71.400   Na  7.44750177 2.053626e-02
## 155 ID:3 - pH 10.5 8.00     Feed   81.600   Na 49.86705236 7.808090e-03
## 156 ID:3 - pH 10.5 8.00 Permeate   81.600   Na  8.86631922 8.704119e-03
## 157  ID:1 - pH 9.3 0.00     Feed    0.000 SiO2  0.67243675 4.950495e-02
## 158  ID:1 - pH 9.3 3.50     Feed   35.700 SiO2  0.71404794 4.662005e-02
## 159  ID:1 - pH 9.3 3.50 Permeate   35.700 SiO2  0.56258322 5.917160e-02
## 160  ID:1 - pH 9.3 5.00     Feed   51.000 SiO2  0.70239680 4.739336e-02
## 161  ID:1 - pH 9.3 5.00 Permeate   51.000 SiO2  0.59087883 5.633803e-02
## 162  ID:1 - pH 9.3 6.00     Feed   61.200 SiO2  0.75399467 4.415011e-02
## 163  ID:1 - pH 9.3 6.00 Permeate   61.200 SiO2  0.68741678 4.842615e-02
## 164  ID:1 - pH 9.3 7.00     Feed   71.400 SiO2  0.80559254 4.132231e-02
## 165  ID:1 - pH 9.3 7.00 Permeate   71.400 SiO2  0.62083888 5.361930e-02
## 166  ID:1 - pH 9.3 8.00     Feed   81.600 SiO2  0.83555260 3.984064e-02
## 167  ID:1 - pH 9.3 8.00 Permeate   81.600 SiO2  0.63748336 5.221932e-02
## 168  ID:1 - pH 9.3 8.70     Feed   88.740 SiO2  0.92210386 3.610108e-02
## 169  ID:1 - pH 9.3 8.70 Permeate   88.740 SiO2  0.66910786 4.975124e-02
## 170 ID:2 - pH 10.2 0.00     Feed    0.000 SiO2  0.67743009 4.914005e-02
## 171 ID:2 - pH 10.2 1.25     Feed   15.000 SiO2  0.73901465 4.504505e-02
## 172 ID:2 - pH 10.2 1.25 Permeate   15.000 SiO2  0.37283622 8.928571e-02
## 173 ID:2 - pH 10.2 3.00     Feed   36.000 SiO2  0.80892144 4.115226e-02
## 174 ID:2 - pH 10.2 3.00 Permeate   36.000 SiO2  0.42443409 7.843137e-02
## 175 ID:2 - pH 10.2 4.00     Feed   48.000 SiO2  0.89047936 3.738318e-02
## 176 ID:2 - pH 10.2 4.00 Permeate   48.000 SiO2  0.43109188 7.722008e-02
## 177 ID:2 - pH 10.2 5.00     Feed   60.000 SiO2  0.92709720 3.590664e-02
## 178 ID:2 - pH 10.2 5.00 Permeate   60.000 SiO2  0.45439414 7.326007e-02
## 179 ID:2 - pH 10.2 5.50     Feed   66.000 SiO2  1.05193076 3.164557e-02
## 180 ID:2 - pH 10.2 5.50 Permeate   66.000 SiO2  0.49267643 6.756757e-02
## 181 ID:2 - pH 10.2 6.00     Feed   72.000 SiO2  1.18175766 2.816901e-02
## 182 ID:2 - pH 10.2 6.00 Permeate   72.000 SiO2  0.51098535 6.514658e-02
## 183 ID:2 - pH 10.2 6.50     Feed   78.000 SiO2  1.30659121 2.547771e-02
## 184 ID:2 - pH 10.2 6.50 Permeate   78.000 SiO2  0.53928096 6.172840e-02
## 185 ID:3 - pH 10.5 0.00     Feed    0.000 SiO2  0.66744341 4.987531e-02
## 186 ID:3 - pH 10.5 2.50     Feed   25.500 SiO2  0.82223702 4.048583e-02
## 187 ID:3 - pH 10.5 2.50 Permeate   25.500 SiO2  0.28129161 1.183432e-01
## 188 ID:3 - pH 10.5 4.00     Feed   40.800 SiO2  0.86884154 3.831418e-02
## 189 ID:3 - pH 10.5 4.00 Permeate   40.800 SiO2  0.31125166 1.069519e-01
## 190 ID:3 - pH 10.5 5.00     Feed   51.000 SiO2  1.01697736 3.273322e-02
## 191 ID:3 - pH 10.5 5.00 Permeate   51.000 SiO2  0.33122503 1.005025e-01
## 192 ID:3 - pH 10.5 6.00     Feed   61.200 SiO2  1.11850866 2.976190e-02
## 193 ID:3 - pH 10.5 6.00 Permeate   61.200 SiO2  0.35785619 9.302326e-02
## 194 ID:3 - pH 10.5 7.00     Feed   71.400 SiO2  1.35486019 2.457002e-02
## 195 ID:3 - pH 10.5 7.00 Permeate   71.400 SiO2  0.39946738 8.333333e-02
## 196 ID:3 - pH 10.5 8.00     Feed   81.600 SiO2  1.63115846 2.040816e-02
## 197 ID:3 - pH 10.5 8.00 Permeate   81.600 SiO2  0.44607190 7.462687e-02
## 198 ID:3 - pH 10.5 8.17     Feed   83.334 SiO2  1.62616511 2.047083e-02
## 199 ID:3 - pH 10.5 8.17 Permeate   83.334 SiO2  0.46604527 7.142857e-02
##                   plot
## 1   Ca, Cl, SiO2, SO4 
## 2   Ca, Cl, SiO2, SO4 
## 3   Ca, Cl, SiO2, SO4 
## 4   Ca, Cl, SiO2, SO4 
## 5   Ca, Cl, SiO2, SO4 
## 6   Ca, Cl, SiO2, SO4 
## 7   Ca, Cl, SiO2, SO4 
## 8   Ca, Cl, SiO2, SO4 
## 9   Ca, Cl, SiO2, SO4 
## 10  Ca, Cl, SiO2, SO4 
## 11  Ca, Cl, SiO2, SO4 
## 12  Ca, Cl, SiO2, SO4 
## 13  Ca, Cl, SiO2, SO4 
## 14  Ca, Cl, SiO2, SO4 
## 15  Ca, Cl, SiO2, SO4 
## 16  Ca, Cl, SiO2, SO4 
## 17  Ca, Cl, SiO2, SO4 
## 18  Ca, Cl, SiO2, SO4 
## 19  Ca, Cl, SiO2, SO4 
## 20  Ca, Cl, SiO2, SO4 
## 21  Ca, Cl, SiO2, SO4 
## 22  Ca, Cl, SiO2, SO4 
## 23  Ca, Cl, SiO2, SO4 
## 24  Ca, Cl, SiO2, SO4 
## 25  Ca, Cl, SiO2, SO4 
## 26  Ca, Cl, SiO2, SO4 
## 27  Ca, Cl, SiO2, SO4 
## 28  Ca, Cl, SiO2, SO4 
## 29  Ca, Cl, SiO2, SO4 
## 30  Ca, Cl, SiO2, SO4 
## 31  Ca, Cl, SiO2, SO4 
## 32  Ca, Cl, SiO2, SO4 
## 33  Ca, Cl, SiO2, SO4 
## 34  Ca, Cl, SiO2, SO4 
## 35  Ca, Cl, SiO2, SO4 
## 36  Ca, Cl, SiO2, SO4 
## 37  Ca, Cl, SiO2, SO4 
## 38  Ca, Cl, SiO2, SO4 
## 39  Ca, Cl, SiO2, SO4 
## 40  Ca, Cl, SiO2, SO4 
## 41  Ca, Cl, SiO2, SO4 
## 42  Ca, Cl, SiO2, SO4 
## 43  Ca, Cl, SiO2, SO4 
## 44  Ca, Cl, SiO2, SO4 
## 45  Ca, Cl, SiO2, SO4 
## 46  Ca, Cl, SiO2, SO4 
## 47  Ca, Cl, SiO2, SO4 
## 48  Ca, Cl, SiO2, SO4 
## 49  Ca, Cl, SiO2, SO4 
## 50  Ca, Cl, SiO2, SO4 
## 51  Ca, Cl, SiO2, SO4 
## 52  Ca, Cl, SiO2, SO4 
## 53  Ca, Cl, SiO2, SO4 
## 54  Ca, Cl, SiO2, SO4 
## 55  Ca, Cl, SiO2, SO4 
## 56  Ca, Cl, SiO2, SO4 
## 57  Ca, Cl, SiO2, SO4 
## 58  Ca, Cl, SiO2, SO4 
## 59  Ca, Cl, SiO2, SO4 
## 60  Ca, Cl, SiO2, SO4 
## 61  Ca, Cl, SiO2, SO4 
## 62  Ca, Cl, SiO2, SO4 
## 63  Ca, Cl, SiO2, SO4 
## 64  Ca, Cl, SiO2, SO4 
## 65  Ca, Cl, SiO2, SO4 
## 66  Ca, Cl, SiO2, SO4 
## 67  Ca, Cl, SiO2, SO4 
## 68  Ca, Cl, SiO2, SO4 
## 69  Ca, Cl, SiO2, SO4 
## 70  Ca, Cl, SiO2, SO4 
## 71  Ca, Cl, SiO2, SO4 
## 72  Ca, Cl, SiO2, SO4 
## 73  Ca, Cl, SiO2, SO4 
## 74  Ca, Cl, SiO2, SO4 
## 75  Ca, Cl, SiO2, SO4 
## 76  Ca, Cl, SiO2, SO4 
## 77  Ca, Cl, SiO2, SO4 
## 78  Ca, Cl, SiO2, SO4 
## 79  Ca, Cl, SiO2, SO4 
## 80  Ca, Cl, SiO2, SO4 
## 81  Ca, Cl, SiO2, SO4 
## 82  Ca, Cl, SiO2, SO4 
## 83  Ca, Cl, SiO2, SO4 
## 84  Ca, Cl, SiO2, SO4 
## 85  Ca, Cl, SiO2, SO4 
## 86  Ca, Cl, SiO2, SO4 
## 87  Ca, Cl, SiO2, SO4 
## 88  Ca, Cl, SiO2, SO4 
## 89  Ca, Cl, SiO2, SO4 
## 90  Ca, Cl, SiO2, SO4 
## 91  Ca, Cl, SiO2, SO4 
## 92  Ca, Cl, SiO2, SO4 
## 93  Ca, Cl, SiO2, SO4 
## 94  Ca, Cl, SiO2, SO4 
## 95  Ca, Cl, SiO2, SO4 
## 96  Ca, Cl, SiO2, SO4 
## 97  Ca, Cl, SiO2, SO4 
## 98  Ca, Cl, SiO2, SO4 
## 99  Ca, Cl, SiO2, SO4 
## 100 Ca, Cl, SiO2, SO4 
## 101 Ca, Cl, SiO2, SO4 
## 102 Ca, Cl, SiO2, SO4 
## 103 Ca, Cl, SiO2, SO4 
## 104 Ca, Cl, SiO2, SO4 
## 105 Ca, Cl, SiO2, SO4 
## 106 Ca, Cl, SiO2, SO4 
## 107 Ca, Cl, SiO2, SO4 
## 108 Ca, Cl, SiO2, SO4 
## 109 Ca, Cl, SiO2, SO4 
## 110 Ca, Cl, SiO2, SO4 
## 111 Ca, Cl, SiO2, SO4 
## 112 Ca, Cl, SiO2, SO4 
## 113 Ca, Cl, SiO2, SO4 
## 114 Ca, Cl, SiO2, SO4 
## 115 Ca, Cl, SiO2, SO4 
## 116 Ca, Cl, SiO2, SO4 
## 117 Ca, Cl, SiO2, SO4 
## 118                 Na
## 119                 Na
## 120                 Na
## 121                 Na
## 122                 Na
## 123                 Na
## 124                 Na
## 125                 Na
## 126                 Na
## 127                 Na
## 128                 Na
## 129                 Na
## 130                 Na
## 131                 Na
## 132                 Na
## 133                 Na
## 134                 Na
## 135                 Na
## 136                 Na
## 137                 Na
## 138                 Na
## 139                 Na
## 140                 Na
## 141                 Na
## 142                 Na
## 143                 Na
## 144                 Na
## 145                 Na
## 146                 Na
## 147                 Na
## 148                 Na
## 149                 Na
## 150                 Na
## 151                 Na
## 152                 Na
## 153                 Na
## 154                 Na
## 155                 Na
## 156                 Na
## 157 Ca, Cl, SiO2, SO4 
## 158 Ca, Cl, SiO2, SO4 
## 159 Ca, Cl, SiO2, SO4 
## 160 Ca, Cl, SiO2, SO4 
## 161 Ca, Cl, SiO2, SO4 
## 162 Ca, Cl, SiO2, SO4 
## 163 Ca, Cl, SiO2, SO4 
## 164 Ca, Cl, SiO2, SO4 
## 165 Ca, Cl, SiO2, SO4 
## 166 Ca, Cl, SiO2, SO4 
## 167 Ca, Cl, SiO2, SO4 
## 168 Ca, Cl, SiO2, SO4 
## 169 Ca, Cl, SiO2, SO4 
## 170 Ca, Cl, SiO2, SO4 
## 171 Ca, Cl, SiO2, SO4 
## 172 Ca, Cl, SiO2, SO4 
## 173 Ca, Cl, SiO2, SO4 
## 174 Ca, Cl, SiO2, SO4 
## 175 Ca, Cl, SiO2, SO4 
## 176 Ca, Cl, SiO2, SO4 
## 177 Ca, Cl, SiO2, SO4 
## 178 Ca, Cl, SiO2, SO4 
## 179 Ca, Cl, SiO2, SO4 
## 180 Ca, Cl, SiO2, SO4 
## 181 Ca, Cl, SiO2, SO4 
## 182 Ca, Cl, SiO2, SO4 
## 183 Ca, Cl, SiO2, SO4 
## 184 Ca, Cl, SiO2, SO4 
## 185 Ca, Cl, SiO2, SO4 
## 186 Ca, Cl, SiO2, SO4 
## 187 Ca, Cl, SiO2, SO4 
## 188 Ca, Cl, SiO2, SO4 
## 189 Ca, Cl, SiO2, SO4 
## 190 Ca, Cl, SiO2, SO4 
## 191 Ca, Cl, SiO2, SO4 
## 192 Ca, Cl, SiO2, SO4 
## 193 Ca, Cl, SiO2, SO4 
## 194 Ca, Cl, SiO2, SO4 
## 195 Ca, Cl, SiO2, SO4 
## 196 Ca, Cl, SiO2, SO4 
## 197 Ca, Cl, SiO2, SO4 
## 198 Ca, Cl, SiO2, SO4 
## 199 Ca, Cl, SiO2, SO4

###Comparison to SPRR

Jeg ved ikke lige hvad der foregÄr her ???